<template>
  <div>
    <div v-for="(item, index) in arr" style="display: inline-block" :key="index">
      <input type="checkbox" v-model="checkArr" :value="item" /><span>{{ item }}</span>
    </div>
    <p>你选中的元素, 累加的值和为: {{Sum}}</p>
  </div>
</template>

<script>
export default {
  components: {},
  props: {},
  data() {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      checkArr: []
    };
  },
  computed: {
     Sum () {
      return this.checkArr.reduce((sum, value) => sum += value, 0);
    }
  },
  watch: {},
  created() {},
  methods: {},
};
</script>

<style scoped></style>
